Introducing the LKB 9000 Gas chromatograph-mass spectrometer T h e LKB M o d e l 9000 is a f u l l y equipped, combination instrument which provides simple, reliable and flexible operation for the routine mass spectrometric analysis of organic substances p u r i f i e d by the built-in gas chromatograph. It utilizes t h e most a d v a n c e d and sophisticated methods and instrumentation for each of its important unit operations, from sample i n troduction into the gas chromatog r a p h t o r e c o r d i n g o f a mass spectrum. Other inlet systems are provided for operation of the mass spectrometer with previously purified liquids and solids.We are justly proud of its performance, which is eminently suited for biochemical analysis, d e t e r m i n a t i o n o f trace constituents in complex mixtures, molecular structure elucidations, and studies of isotope abundance.
LKB
Gas Chromatography for the prel i m i n a r y p u r i f i c a t i o n of organic compounds in complex mixtures is achieved w i t h coiled columns housed in a compact oven. A circulating air bath assures accurate temperature regulation in isothermal o r t e m p e r a t u r e - p r o g r a m m e d operation. Sample Enrichment in a u n i q u e patented molecule separator (per Becker and Ryhage) is carried out by t h e p r e f e r e n t i a l r e m o v a l o f carrier gas from the effluent stream of the gas chromatograph. Ionization is achieved by electron impact. A u t o m a t i c regulation of electron energy provides optimal levels of ionization during operat i o n o f t h e i o n source as a gas chromatographic detector and for the reproducible production of an array of fragment ions during re-
cording of a mass spectrum. Mass Spectra are obtained with a rapid-scanning, single-focussing magnetic sector analyzer with sufficient resolving power for operation with compounds in a molecular weight range up to 1200. Optimal resolving power under different operating conditions w i t h externally variable ion source and collector slits. Components for the GLC inlet are designed to provide optimal performance with the most demanding chromatographic c o n d i t i o n s . M i n i m u m dead volume and effective, uniform temperature control of all parts assures s y m m e t r i c a l peaks with no loss of effective column efficiency, even w i t h capillary columnsand long packed columns. Write for brochu re 9000A4, and list of satisfied users.
LKB INSTRUMENTS, INC., 12221 Parklawn Drive, Rockville, Maryland 20852 LKB-PRODUKTER AB, P.O. Box 76, S t o c k h o l m - B r o m m a 1 , S w e d e n . Circle No. 163 on Readers' Service Card
118
A
•
ANALYTICAL CHEMISTRY
Circle No. 202 on Readers' Service Card -
